/**
  ******************************************************************************
  * @file    bs32f1xx_ll_exti.c
  * @author  MCU Application Team
  * @brief   EXTI LL module driver.
  ******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)

/* Includes ------------------------------------------------------------------*/
#include "bs32f1xx_ll_exti.h"

#ifdef  USE_FULL_ASSERT
#include "bs32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif
/** @addtogroup BS32F1xx_LL_Driver
  * @{
  */

#if defined (EXTI)
/** @addtogroup EXTI_LL EXTI
  * @{
  */

/* Private macros ------------------------------------------------------------*/
/** @addtogroup EXTI_LL_Private_Macros EXTI Private Macros
  * @{
  */ 

#define IS_LL_EXTI_LINE(__VALUE__)                (((__VALUE__) & ~LL_EXTI_LINE_ALL) == 0x00000000U)

#define IS_LL_EXTI_MODE(__VALUE__)                (((__VALUE__) == LL_EXTI_MODE_IT))


#define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))

/**
  * @}
  */

/* Exported functions --------------------------------------------------------*/
/** @addtogroup EXTI_LL_Exported_Functions
  * @{
  */

/**
  * @brief  De-initialize the EXTI registers to their default reset values.
  * @retval An ErrorStatus enumeration value:
  *          - 0x00: EXTI registers are de-initialized
  */
uint32_t LL_EXTI_DeInit(void)
{
  /* Interrupt mask register set to default reset values */
  LL_EXTI_WriteReg(IMR1,0xFFFF0000U);
  /* Rising Trigger selection register set to default reset values */
  LL_EXTI_WriteReg(RTSR1,0x00000000U);
  /* Falling Trigger selection register set to default reset values */
  LL_EXTI_WriteReg(FTSR1,0x00000000U);
  /* Software interrupt event register set to default reset values */
  LL_EXTI_WriteReg(SWIER1,0x00000000U);
  /* Pending register set to default reset values */
  LL_EXTI_WriteReg(RPR1,0x0000FFFFU);
  LL_EXTI_WriteReg(FPR1,0x0000FFFFU);

  return 0x00u;
}

/**
  * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
  * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
  * @retval An ErrorStatus enumeration value:
  *          - 0x00: EXTI registers are initialized
  *          - any other calue : wrong configuration
  */
uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
{
  uint32_t status = 0x00u;

  /* Check the parameters */
  assert_param(IS_LL_EXTI_LINE(EXTI_InitStruct->Line));
  assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
  assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));

  /* ENABLE LineCommand */
  if (EXTI_InitStruct->LineCommand != DISABLE)
  {
    assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));

    /* Configure EXTI Lines */
    if (EXTI_InitStruct->Line != LL_EXTI_LINE_NONE)
    {

      if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
      {
        switch (EXTI_InitStruct->Trigger)
        {
          case LL_EXTI_TRIGGER_RISING:
            /* First Disable Falling Trigger on provided Lines */
            LL_EXTI_DisableFallingTrig(EXTI_InitStruct->Line);
            /* Then Enable Rising Trigger on provided Lines */
            LL_EXTI_EnableRisingTrig(EXTI_InitStruct->Line);
            break;
          case LL_EXTI_TRIGGER_FALLING:
            /* First Disable Rising Trigger on provided Lines */
            LL_EXTI_DisableRisingTrig(EXTI_InitStruct->Line);
            /* Then Enable Falling Trigger on provided Lines */
            LL_EXTI_EnableFallingTrig(EXTI_InitStruct->Line);
            break;
          case LL_EXTI_TRIGGER_RISING_FALLING:
            LL_EXTI_EnableRisingTrig(EXTI_InitStruct->Line);
            LL_EXTI_EnableFallingTrig(EXTI_InitStruct->Line);
            break;
          default:
            status |= 0x02u;
            break;
        }
      }
      switch (EXTI_InitStruct->Mode)
      {
        case LL_EXTI_MODE_IT:
          
          /* Then Enable IT on provided Lines */
          LL_EXTI_EnableIT(EXTI_InitStruct->Line);
          break;
        
        default:
          status = 0x01u;
          break;
      }      
    }
  }
  /* DISABLE LineCommand */
  else
  {
    /* De-configure EXTI Lines */
    LL_EXTI_DisableIT(EXTI_InitStruct->Line);    
  }

  return status;
}

/**
  * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
  * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
  * @retval None
  */
void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
{
  EXTI_InitStruct->Line           = LL_EXTI_LINE_NONE;
  EXTI_InitStruct->LineCommand    = DISABLE;
  EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
  EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
}

/**
  * @}
  */
  
/**
  * @}
  */

#endif /* defined (EXTI) */

/**
  * @}
  */

#endif /* USE_FULL_LL_DRIVER */

/************************ (C) COPYRIGHT BSMicroelectronics *****END OF FILE****/
